It is possible that the main title of the report Marfan Syndrome is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
As Jenny points out, being able to lisp the alphabet song at age two has little to do with 'knowing' the alphabet. And, yes, most children learn the letters by sight and sound in kindergarten, although most are capable of learning this information sooner if diligently taught by parents or others.
Alphabets & Numbers for Kids help the kid to learn English alphabets in a easy way. The screen includes capital and small letter alphabets and an image related to it. The Alphabet is played so kids can memories it. The sound played includes the alphabet and then a sentence saying its relation to the image. Example 'A' , A for Apple.